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Finding the Fourth Proportional to 562.74, 776.25 and 431.70

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Solution

The fourth proportional to 562.74, 776.25 and 431.70 is: 595.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    562.74 : 776.25 = 431.70 : x
  2. Step 2: Convert to fraction form
    562.74/776.25 = 431.70/x
  3. Step 3: Cross multiply
    562.74x = 776.25 × 431.70
  4. Step 4: Simplify right side
    562.74x = 335,107.13
  5. Step 5: Solve for x
    x = 335,107.13/562.74
  6. Step 6: Final answer
    x = 595.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.